Saw



Dec. 15,1936. D HOWE ET AL 2,064,261 7 SAW Filed Nov. 2, 1935 FIG tau 52 -r TOR/v57 Patented Dec. 15, 1936 UNITED STATES PATENT OFFICE SAW PaulD. Howe and Stanley L. Batchelder,

San Jose, Calif. Application November 2, 1935, Serial No. 47,993

1 Claim.

. its accuracy.

It is another object of the invention to provide a saw of the characterindicated so constructed that there will be less waste in the materialoperated upon and more useful material obtained from a given piece oflumber.

In the drawing:

Figure 1 is a side elevation of a portion of a saw embodying ourinvention.

Figure 2 is a sectional view on line 2-2 of Figure 1, greatly enlarged.

Figure 3 is a sectional view of another embodiment of the invention.

Referring now to that form of the invention shown in Figures 1 and 2,

saw. This band is fiat as indicated at 2 on the side passing over andcontacting the drive wheel, not shown. The other side of the band has aflat portion as 3 extending longitudinally of the band and along itscentral portion, and side portions 4 and 5 sloping away from the centralportion 3 to the edges 6 and 1. In the present case the edge 1 isprovided with teeth as 8.

In operation our improved form of band saw as above described is mountedupon the wheels in the same manner as an ordinary band saw, with itsflat side engaging said wheels, and when at rest its crosssectionalconfiguration appears as shown in solid lines in Figure 2. When the sawis operated at cutting speeds, however, a change takes place in itscross-sectional configuration throughout its length between thesupporting wheels. This change is occasioned by its high speed ofrotation which throws the two edges into the plane indicated by dottedline 9.

its

increased resistance to cutting, is fed a little too fast. saw thecutting edge is or when the work But with our improved held true to thework at the invention shown in Figure 3 a band I is shown having thethick central portion at H, but in this case this thickened centralportion is equally disposed on both sides of the median line I2 and bothsidesof the band are bevelled to the front and rearv edges l3 and I4 asat I-l6 and. l1l8.

In both of the embodiments of the invention higher rates of feed andfollow lesser paths of resistance at an angle thereto is successfullyresisted by the relatively thick central portion of the band.

It is to be PAUL D. HOWE. STANLEY L. BATCHELDER.

